压力对溶剂脱沥青过程的影响

研究了压力对溶剂脱沥青过程的影响。试验结果表明，在低于溶剂的临界温度下操作，压力对脱油沥青的收经和性质的影响不容忽视。以于同一种渣－溶剂体系，在其它条件（如温度、溶剂比等）不变的情况下，脱油沥青的收率随着压力的升高而降低，脱油沥青的蜡含量降低，而沥青脱油的收率随着压力的升高而增加。     

基于MPC850嵌入式通信平台的I2C接口设计

介绍了I^2C总线的数据形式及数据传输格式，以基于MPC850的嵌入式通信平台为例说明了I^2C总线的应用及其软、硬件实现方法。     

MEMS光开关的静电驱动技术

本文主要介绍MEMS光开关4种静电驱动的不同结构,及其各自在光开关性能上的优势与不足,这对MEMS光开关的设计研究具有参考价值.     

Computation of static and frequency‐dependent line parameters of multilayer CPW using static SDA and single layer reduction method

We reformulate the quasi‐static SDA applicable to a lossy multilayer CPW that also incorporates two‐layer model of a conductor thickness and the concept of effective permeability due to magnetic field penetration in an imperfect conductor. The present static SDA formulation accounts for the effect of conductor thickness and low frequency dispersion on computation of quasi‐static effective relative permittivity and characteristic impedance. The paper also presents the single layer reduction (SLR) formulation and circuit model to compute frequency dependent line parameters of a lossy multilayer CPW. The accuracy of formulation is comparable to that of HFSS and CST, without using complex and time consuming full‐wave methods. The results of CST for ε_eff, Z₀, α_d, α_c of multilayer CPW, in the frequency range 1–100 GHz, deviate from results of HFSS up to 1.26%, 2.78%, 11.75%, and 18.7%, respectively; whereas corresponding deviations of present formulation are up to 1.56%, 2.4%, 3.04%, and 7%. The results of the present formulation and HFSS are also compared against the available experimental results. © 2013 Wiley Periodicals, Inc. Int J RF and Microwave CAE 24:18–29, 2014.     

半干法烟气脱硫技术研究进展

对国内外常用的半于法烟气脱硫技术进行了介绍,并对几种有代表性的半干法脱硫技术的技术特点及进展状况进行了简单分析。     

用水变化动态结构分解分析模型研究Ⅰ:建模

在国民经济发展中用水变化受到多种驱动因子的影响。为分析各因子对用水变化的贡献,本文针对结构分解分析(SDA)模型静态性和分解结果不唯一性问题,引入一种时间路径函数,构建了动态SDA模型。模型考虑了节水技术水平、经济系统效率、人口规模、消费水平和最终需求结构5个影响因子,引入非线性时间路径函数建立时间路径表达式,并通过解线性方程组获得唯一时间路径参数。其时间路径函数能很好的表达影响因子变化的客观规律,保证了分解结果的可靠性。该模型兼具动态性、唯一性、客观性和普适性,对相关研究具有重要参考价值。     

LS-DSP中串行分布式数字滤波器的功耗优化设计

采用一种优化阶符的二进制数据表示方法,达到了减小LS-DSP内串行分布式计算滤波器的动态功耗的目的．实验结果表明,该方法可有效减小LS-DSP内串行分布式计算滤波器10%的动态功耗．     

China's foreign trade and climate change: A case study of CO2 emissions

The globalization of trade has numerous environmental implications. Trade creates a mechanism for consumers to shift environmental pollution associated with their consumption to other countries. Carbon leakage exerts great influences on international trade and economy. Applying an input–output approach, the paper estimates the amount of carbon dioxide (CO₂) embodied in China's foreign trade during 1997–2007. It is found that 10.03–26.54% of China's annual CO₂ emissions are produced during the manufacture of export goods destined for foreign consumers, while the CO₂ emissions embodied in China's imports accounted for only 4.40% (1997) and 9.05% (2007) of that. We also estimate that the rest of world avoided emitting 150.18 Mt CO₂ in 1997, increasing to 593 Mt in 2007, as a result of importing goods from China, rather than manufacturing the same type and quantity of goods domestically. During 1997–2007, the net “additional” global CO₂ emissions resulting from China's exports were 4894 Mt. Then, the paper divides the trade-embodied emissions into scale, composition and technical effect. It was found that scale and composition effect increased the CO₂ emissions embodied in trade while the technical effect offset a small part of them. Finally, its mechanism and policy implications are presented.